I have an HP Pavillion a475C (which was a higher end model in its debut) and a Dell computer...I bought both of them brand new in 2004. The Dell bit the dirt 6 months ago. The HP is running REALLY SLOW, so I upgraded the RAM to 2 GB and added an external memory of 1TB. It is STILL running very slow. I clean daily, sometimes hourly, just to try to keep it from hanging up when loading pages/programs. I heard from your blog that uninstalling and reinstalling Windows XP may help. I have none of my original disks with the HP, but the product key is on a sticker on the side of my PC. I have the reinstallation disk for Windows XP for the Dell. Can I use the reinstallation disk on my HP with my key? It says on the pkg to only use it to reinstall on the Dell....? Also, since the upgrade in RAM, I now get a fast beeping sound (no patterns, just continuous) sometimes when rebooting as it hangs up, then on a second reboot it usually goes through ok. What is that? And how do I fix it?